Thermosensitive Mattress Topper Fabric for Vapor Control
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Solution Overview
Problem
Conventional mattress toppers made of vapor permeable materials face a tradeoff between effective perspiration vapor withdrawal and resistance to chemical degradation during cleaning, as their hydrophilic properties allow absorption of cleaning chemicals.
Innovation Solution
A mattress topper with a temperature-dependent vapor transfer fabric that adjusts its permeability based on occupancy, being more permeable when an occupant is present and less permeable when absent, allowing for efficient vapor transport and reduced chemical absorption during cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the topper cover is made of hydrophilic vapor permeable material, then perspiration vapor withdrawal capability is improved, but resistance to chemical degradation during cleaning deteriorates
Solution Approach 1:
The fabric's vapor transfer properties dynamically change with temperature. When the topper is warm (occupant present), the fabric becomes more vapor permeable to enhance moisture withdrawal. When cool (no occupant), vapor permeability decreases to prevent chemical absorption during cleaning, thus resolving the contradiction between vapor withdrawal capability and chemical resistance
Solution Approach 2:
The invention changes the physical parameter of vapor permeability based on temperature conditions. The fabric exhibits different vapor transfer rates at different temperatures, allowing it to be highly permeable during use for effective perspiration management, and less permeable during cleaning for chemical resistance, thereby resolving the tradeoff
2Productivity
If the fabric vapor permeability is increased, then perspiration vapor transport is improved, but cleaning chemical absorption increases causing material degradation
Solution Approach 1:
The fabric dynamically adjusts its vapor permeability based on temperature conditions. During occupancy when warmth is detected, the fabric becomes more permeable to efficiently transport perspiration vapor. During cleaning when the topper is cool, permeability decreases to minimize chemical absorption and prevent degradation, thus resolving the contradiction between vapor transport efficiency and chemical resistance
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The temperature-dependent vapor transfer fabric effectively manages moisture vapor withdrawal during occupancy while minimizing chemical degradation during cleaning, enhancing both comfort and durability.
Implementation Method 1
At least part of the exterior cover is made of a fabric having a variable vapor transfer property such that when the temperature of the fabric is within a first temperature range consistent with the presence of an occupant on the mattress the fabric exhibits a first vapor transfer rate sufficiently high that the fabric is permeable to vapor transport across the fabric, and when the temperature of the fabric is lower than the first temperature range and consistent with the absence of an occupant the fabric exhibits a second vapor transfer rate lower than that of the first vapor transfer rate
Data Source
AI summary
A nonintegrated mattress topper comprises a cover at least part of which comprises a fabric having a variable vapor transfer property. When the fabric temperature is within a first range consistent with the presence of an occupant on the mattress the fabric exhibits a first vapor transfer rate sufficiently high that the fabric is permeable to vapor transport across the fabric, and when the fabric temperature is lower than the first temperature range and consistent with the absence of an occupant the fabric exhibits a second vapor transfer rate lower than that of the first vapor transfer rate. Also disclosed is an occupant support assembly comprising a mattress and a nonintegrated topper having the variable vapor transfer property. Also disclosed is an occupant support system comprising a mattress and an integrated topper at least part of which is made of a fabric having the temperature dependent vapor permeability.